Management server, management method, and storage medium

A management method comprising executing, by a management server:

• receiving, in response to occurrence of a physical use relationship between a first target and a second target for using the second target by the first target, a first identifier of the first target, first unique information of the first target, a second identifier of the second target, and second unique information of the second target from at least one of a first terminal of the first target and a second terminal of the second target;
• requesting a first server to authenticate the first target by transmitting the received first identifier and the received first unique information to the first server;
• receiving a result of authentication of the first target from the first server;
• requesting a second server to authenticate the second target by transmitting the received second identifier and the received second unique information to the second server;
• receiving a result of authentication of the second target from the second server;
• and
• setting a correspondence between the first identifier and the second identifier when the received results of the authentication show that both the first target and the second target have successfully been authenticated;
• and
• recording a time at which the correspondence is set as a starting time of the first target being linked with the second target, wherein
• the management server, the first terminal, the second terminal, the first server, and the second server are separate and distinct from each other.

A non-transitory computer-readable storage medium storing instructions that are executable by one or more processors and that cause the one or more processors to perform functions comprising:

• receiving, in response to occurrence of a physical use relationship between a first target and a second target for using the second target by the first target, a first identifier of the first target, first unique information of the first target, a second identifier of the second target, and second unique information of the second target from at least one of a first terminal of the first target and a second terminal of the second target;
• requesting a first server to authenticate the first target by transmitting the received first identifier and the received first unique information to the first server;
• receiving a result of authentication of the first target from the first server;
• requesting a second server to authenticate the second target by transmitting the received second identifier and the received second unique information to the second server;
• receiving a result of authentication of the second target from the second server;
• setting a correspondence between the first identifier and the second identifier when the received results of the authentication show that both the first target and the second target have successfully been authenticated;
• and
• recording a time at which the correspondence is set as a starting time of the first target being linked with the second target, wherein
• the management server, the first terminal, the second terminal, the first server, and the second server are separate and distinct from each other.